//
// Buttons
// --------------------------------------------------

// Base styles
// --------------------------------------------------

.btn {
    display: inline-block;
    margin-bottom: 0; // For input.btn
    font-weight: $btn-font-weight;
    text-align: center;
    vertical-align: middle;
    touch-action: manipulation;
    cursor: pointer;
    background-image: none; // Reset unusual Firefox-on-Android default style; see https://github.com/necolas/normalize.css/issues/214
    border: 1px solid transparent;
    white-space: nowrap;
    @include button-size(
        $padding-base-vertical,
        $padding-base-horizontal,
        $font-size-base,
        $line-height-base,
        $btn-border-radius-base
    );
    @include user-select(none);

    &,
    &:active,
    &.active {
        &:focus,
        &.focus {
            @include tab-focus;
        }
    }

    &:hover,
    &:focus,
    &.focus {
        color: $btn-default-color;
        text-decoration: none;
    }

    &:active,
    &.active {
        outline: 0;
        background-image: none;
        @include box-shadow(inset 0 3px 5px rgba(0, 0, 0, 0.125));
    }

    &.disabled,
    &[disabled],
    fieldset[disabled] & {
        cursor: $cursor-disabled;
        @include opacity(0.65);
        @include box-shadow(none);
    }

    // [converter] extracted a& to a.btn
}

a.btn {
    &.disabled,
    fieldset[disabled] & {
        pointer-events: none; // Future-proof disabling of clicks on `<a>` elements
    }
}

// Alternate buttons
// --------------------------------------------------

.btn-default {
    @include button-variant(
        $btn-default-color,
        $btn-default-bg,
        $btn-default-border
    );
}
.btn-primary {
    @include button-variant(
        $btn-primary-color,
        $btn-primary-bg,
        $btn-primary-border
    );
}
// Success appears as green
.btn-success {
    @include button-variant(
        $btn-success-color,
        $btn-success-bg,
        $btn-success-border
    );
}
// Info appears as blue-green
.btn-info {
    @include button-variant($btn-info-color, $btn-info-bg, $btn-info-border);
}
// Warning appears as orange
.btn-warning {
    @include button-variant(
        $btn-warning-color,
        $btn-warning-bg,
        $btn-warning-border
    );
}
// Danger and error appear as red
.btn-danger {
    @include button-variant(
        $btn-danger-color,
        $btn-danger-bg,
        $btn-danger-border
    );
}

// Link buttons
// -------------------------

// Make a button look and behave like a link
.btn-link {
    color: $link-color;
    font-weight: normal;
    border-radius: 0;

    &,
    &:active,
    &.active,
    &[disabled],
    fieldset[disabled] & {
        background-color: transparent;
        @include box-shadow(none);
    }
    &,
    &:hover,
    &:focus,
    &:active {
        border-color: transparent;
    }
    &:hover,
    &:focus {
        color: $link-hover-color;
        text-decoration: $link-hover-decoration;
        background-color: transparent;
    }
    &[disabled],
    fieldset[disabled] & {
        &:hover,
        &:focus {
            color: $btn-link-disabled-color;
            text-decoration: none;
        }
    }
}

// Button Sizes
// --------------------------------------------------

.btn-lg {
    // line-height: ensure even-numbered height of button next to large input
    @include button-size(
        $padding-large-vertical,
        $padding-large-horizontal,
        $font-size-large,
        $line-height-large,
        $btn-border-radius-large
    );
}
.btn-sm {
    // line-height: ensure proper height of button next to small input
    @include button-size(
        $padding-small-vertical,
        $padding-small-horizontal,
        $font-size-small,
        $line-height-small,
        $btn-border-radius-small
    );
}
.btn-xs {
    @include button-size(
        $padding-xs-vertical,
        $padding-xs-horizontal,
        $font-size-small,
        $line-height-small,
        $btn-border-radius-small
    );
}

// Block button
// --------------------------------------------------

.btn-block {
    display: block;
    width: 100%;
}

// Vertically space out multiple block buttons
.btn-block + .btn-block {
    margin-top: 5px;
}

// Specificity overrides
input[type="submit"],
input[type="reset"],
input[type="button"] {
    &.btn-block {
        width: 100%;
    }
}
